My recommendation is to contact a local frame shop, like picture frames. Not only do they often have scrap material that you can have for free, or for dirt cheap, but they can also help you build a frame, or give you pointers on how to do that.

Exactly same situation. Sorting out software side first but have a 40" tv I’m planning on using now and starting to think about the frame and mirror.

Got two samples of mirror today to test. One lets a lot of light and colour thru but isn’t very mirror’ie. The other doesn’t let colour thru but still looks Kewl. And looks good enough for normal mirror.

Frame I thought about metal. Had a google on making frames. Or buying a pre made aluminium tv frame which they make for displays etc.

Thinking now I’m either gonna use flat bits of wood. Or cornice gyprock type moulding to make straight picture frame. Then mount the tv to that.

@Mitchfarino I did something similar with my mirror. I ended up routing a channel in two pieces that spanned in the interior of the box. The monitor edges fit in the channel and a couple of corner brackets secured each piece to the interior of the box. If you weren’t too concerned with visible screws on the outside of your box, you could skip the corner brackets for driving screws into the monitor supports from the outside.

@Mitchfarino Heh. Well, that pic was just for holding the monitor in place. I used a french cleat to mount the mirror on the wall. One piece screws into the wall, the other screws into the edge of the box. You can make one fairly simply or just buy one from a hardware store.